Acoustic Bass Booster for incredible bass response, 30mm drivers for wide frequency response (5-22 kHz).Connectivity Technology: Wired In-line microphone for hands-free phone calling, Compatible with Apple or Android smartphones, Lightweight on-the-ear design Free SmartKey App for customized in-line remote function, Swivel design for portability, 47 1/4 in. (1.2m) tangle-free Y-type cord
